On Mon, Jun 24, 2013 at 12:04:00AM -0700, matthew patton wrote: > If some older man pages are to be believed there once was a capability > to keep a heat map of busy extents. Is there a way to revive that > capability? I expect "last I/O within 30 seconds, 5 minute, 15minute" is > probably sufficient for most uses as well as summary counters along the > same lines. Mikulas is developing a replacement here: http://people.redhat.com/~mpatocka/patches/kernel/dm-statistics/ Documentation appears at the end of the kernel patch. If you want to try it out at the moment, you'll need this patch first I think: http://people.redhat.com/agk/patches/linux/editing/dm-optimize-use-SRCU-and-RCU.patch Alasdair _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
